Comment 2 for bug 813816

StacktraceTop:
 emit_signal_for_registration (closure=0x1c677b0, retval=<value optimized out>, n_param_values=2, param_values=0x1c5c4a0, invocation_hint=<value optimized out>, marshal_data=<value optimized out>) at dbus-gobject.c:2125
 signal_emitter_marshaller (closure=0x1c677b0, retval=<value optimized out>, n_param_values=2, param_values=0x1c5c4a0, invocation_hint=<value optimized out>, marshal_data=<value optimized out>) at dbus-gobject.c:2173
 g_closure_invoke (closure=0x1c677b0, return_value=0x0, n_param_values=2, param_values=0x1c5c4a0, invocation_hint=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./gobject/gclosure.c:773
 signal_emit_unlocked_R (node=<value optimized out>, detail=0, instance=0x1c42ab0, emission_return=0x0, instance_and_params=0x1c5c4a0) at /build/buildd/glib2.0-2.29.10/./gobject/gsignal.c:3256
 g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=0x7fff90feb498) at /build/buildd/glib2.0-2.29.10/./gobject/gsignal.c:2987